\section{函数与递归}

\begin{question}
    \item \input{src/questions/q17.tex}
    \item \input{src/questions/q19.tex}
    \item \input{src/questions/q20.tex}
    \item \input{src/questions/q21.tex}
    \item \input{src/questions/q22.tex}
    \item \input{src/questions/q28.tex}
    \item \input{src/questions/q29.tex}
    \item \input{src/questions/q33.tex}
    \item \input{src/questions/q35.tex}
    \item \input{src/questions/q36.tex}
    \item \input{src/questions/q37.tex}
    \item \input{src/questions/q40.tex}
    \item \input{src/questions/q41.tex}
    \item \input{src/questions/q42.tex}
    \item \input{src/questions/q43.tex}
\end{question}